.glyphicon-chevron-left,.glyphicon-chevron-right{
  &:before{
    content: '';
  }
}
.fc-prev-button span{
  width: 15px;
  height: 27.5px;
  background: url("../images/left.png") no-repeat center / 27.5px;
}
.fc-next-button span{
  width: 15px;
  height: 27.5px;
  background: url("../images/right.png") no-repeat center / 27.5px;
}
button{
  outline: none;
}
